I took a bunch of neat accessories off an Eagle AR10 flattop I recently traded, among them a RAS M5 handguard. It is the full sized 20 inch bbl rifle unit(not free floating). It has 2 side and 1 bottom panels attached. It presently fits an AR10, but can be reconverted to fit an AR15 if you replace a small clamp and rollpin (Which I don't have). See www.quarterbore.com for a description of this system and conversion. It snaps right on to replace the original Hand guard.
It is as new, and yours for $235. plus $10. shipping. *SOLD PENDING FUNDS*
I also have a Knights bipod adapter- $30. plus $3. shipping.
Also Armalite AR10 detachable gas block front sight- $40. plus $5 shipping.
US Postal money orders, please.
Sorry I'm not able to post pics..